溶剂对离子液体电化学电容器电解液的影响  

Electrochemical performance of ionic liquid containing solvent as the electrolyte of capacitors

作　　者：孙国华[1] 李开喜[1] 谷建宇[1] 范慧[1] 刘越[1] 

机构地区：[1]中国科学院山西煤炭化学研究所炭材料重点实验室

出　　处：《电子元件与材料》2007年第9期39-42,共4页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(50272070)

摘　　要：研究了有机溶剂[乙腈(AN)、丙酮(Acet)]对离子液体1-乙基-3-甲基咪唑四氟硼酸盐[(EMIm)BF4]电导率和电化学性能的影响。混合电解液体系的电导率在离子液体与有机溶剂的摩尔比为4∶6时达最大值。循环伏安和恒流充放电测试结果表明,添加有机溶剂在很大程度上改善了电容器的电容特性。电容器的比电容在(EMIm)BF4与AN或Acet的摩尔比为4∶6时达最大值,分别为233,173F/g。Influence of organic solvent [acetonitrile （AN） and acetone （Acet）] on the conductivity and electrochemical performance of ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate [（EMIm）BF4]were investigated. The conductivity of mixed electrolyte systems was influenced by the content of organic solvent, and the largest conductivity value occurred when the molar ratio of ionic liquid and organic solvent reach 4 ： 6. Cyclic voltammetry and galvanostatic charge/discharge measurement results indicate organic solvent could improve capacitance characteristic of EC to some extent. Specific capacitance of EC are changed with the content of organic solvent, and the largest specific capacitance occur at the molar ratio of 4 ： 6, and were 233, 173 F · g^-1, respectively.

关 键 词：电子技术 电化学电容器 离子液体 有机溶剂 比电容 

分 类 号：TM53[电气工程—电器]